JP2737584B2 - Scroll compressor - Google Patents

Scroll compressor

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Publication number
JP2737584B2
JP2737584B2 JP33600292A JP33600292A JP2737584B2 JP 2737584 B2 JP2737584 B2 JP 2737584B2 JP 33600292 A JP33600292 A JP 33600292A JP 33600292 A JP33600292 A JP 33600292A JP 2737584 B2 JP2737584 B2 JP 2737584B2
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JP
Japan
Prior art keywords
slider
scroll
main shaft
direction
reverse rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP33600292A
Other languages
Japanese (ja)
Other versions
JPH05248372A (en
Inventor
克良 和田
博史 小川
達也 杉田
清春 池田
稔 石井
正二 萩原
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP3-107966 priority Critical
Priority to JP10796691 priority
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP33600292A priority patent/JP2737584B2/en
Publication of JPH05248372A publication Critical patent/JPH05248372A/en
Application granted granted Critical
Publication of JP2737584B2 publication Critical patent/JP2737584B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28Safety arrangements; Monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0065Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00Control; Monitoring or safety arrangements
    • F04C2270/70Safety, emergency conditions or requirements
    • F04C2270/72Safety, emergency conditions or requirements preventing reverse rotation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
    • F05B2270/00Control
    • F05B2270/10Purpose of the control system
    • F05B2270/109Purpose of the control system to prolong engine life
    • F05B2270/1097Purpose of the control system to prolong engine life by preventing reverse rotation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49229Prime mover or fluid pump making
    • Y10T29/49236Fluid pump or compressor making
    • Y10T29/4924Scroll or peristaltic type

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to protection of a scroll compressor.

[0002]

2. Description of the Related Art FIG.
FIG. 19 is a longitudinal sectional view showing a first conventional scroll type compressor disclosed in the specification of Japanese Patent No. 29127, and FIG. 19 is a sectional view of a principal part in FIG. 18, showing a force acting on the principal part at the time of forward rotation of the motor. I have. In FIG. 18, 1 is a fixed scroll, 2
Is the orbiting scroll, 2a is the base plate of the orbiting scroll 2, 2
b is a swing bearing provided at the center of the base plate 2a on the side opposite to the compression chamber;
Reference numeral 3 denotes a frame fixed to the fixed scroll 1 by bolts or the like, and 4 denotes a ring-shaped Oldham ring for preventing the orbiting scroll 2 from rotating and connecting to the frame 3 so as to revolve in the radial direction. A slider mounting shaft 6 having a flat surface A6a and a flat surface B6b parallel to the axis of the main shaft 5 in an eccentric state is formed at the upper end of the main shaft. A slider 7 is mounted on the slider mounting shaft 6. 5 is mounted so as to be slidable and non-rotatable in a plane perpendicular to the axis of the shaft 5, and is fitted to the rocking bearing 2b while being eccentric from the axis of the main shaft 5. Reference numeral 8 denotes a discharge valve also serving as a check valve.

In FIG. 19, reference numeral 7a denotes a fitting hole provided on the slider 7 for fitting with the slider mounting shaft 6, 7b denotes a sliding surface of the slider 7, and 7c denotes an anti-sliding surface. r is the axis of the main shaft 5 (the center of the fixed scroll 1) to the axis of the sliding bearing 2b (the center of the orbiting scroll 2;
R 1 is the amount of eccentricity when the spiral body of the orbiting scroll 2 is in radial contact with the spiral body of the fixed scroll 1. F ca is the centrifugal force between the orbiting scroll 2 and the slider 7 generated during the orbiting operation of the orbiting scroll 2 and the main shaft 5.
Acts in the direction of a straight line connecting the center of
F ga is a gas load acting on the orbiting scroll 2 in a direction perpendicular to the centrifugal force F ca , Fra is a gas load acting on the orbiting scroll 2 in a direction opposite to the centrifugal force F ca, and F na and μ a are respectively The contact force and the friction coefficient between the sliding surface 7b of the slider 7 and the flat surface A6a of the slider mounting shaft 6 are shown. α is the sliding direction of the slider 7, and the angle between F ca or eccentric direction and inclined in the counter rotational direction of the main shaft 5 with respect to F ca direction is referred to as tilt angle. Here, the sliding direction of the slider 7 refers to a moving direction toward the side where the eccentricity r increases, that is, a moving direction toward the spiral body pressing side. Originally centrifugal force F c is the center of gravity, although F ga and F ra acts on the midpoint between the axes of the axis and the swing bearing 2b of the main shaft 5, due to the deviation of the position of these forces moments can Oldham ring 4 By restraining the reaction force from the Oldham ring 4 from entering the system, it is considered that all of these forces act on the axis of the swing bearing 2b, that is, the center of the slider 7.

Next, the operation will be described. When the power supply terminal is normally connected, the motor rotates normally, and the main shaft 5 rotates forward, the orbiting scroll 2 makes a revolving motion about the axis of the main shaft 5 while being guided by the Oldham ring 4, and is combined with the fixed scroll 1. As a result, the volume of the compression chamber formed is reduced, the refrigerant is compressed, and the discharge valve 8 is pushed up and discharged from the central compression chamber. In this forward rotation, FIG.
Centrifugal force F ca and gas load, as shown in F ga, frictional force between the flat surfaces A6a sliding surface 7b and the slider mounting shaft 6 component force the slider 7 in the slide direction of the resultant force of F ra μ a F
na (the direction changes by 180 ° depending on the moving direction of the slider 7) satisfies Equation 1, and the slider 7 moves in the sliding direction to the position where the orbiting scroll 2 contacts the fixed scroll 1, ie, both scrolls. The eccentricity r 1 determined by
Is pressed against the fixed scroll 1 and the clearance in both radial directions of the scroll is set to 0 to perform a compression action. Further, the slider 7 is further slid to the eccentric amount r 1 ,
Since it is slidable back and forth in the sliding direction, even if the shapes of the scrolls of the fixed scroll 1 and the orbiting scroll 2 are displaced from a predetermined dimension, the scrolls slide until they come into contact with each other. The clearance can always be zero.

[0005]

[Number 1] μ a F na <(F ca -F ra) cosα + F ga sinα

When the motor rotates in the reverse direction and the main shaft 5 rotates in the reverse direction due to connection of the power supply terminal by mistake, a force as shown in FIG. 26 acts. At the time of reverse rotation, the volume of the compression chamber increases, so that the pressure in the central compression chamber decreases, so that the discharge valve 8 closes and acts as a check valve,
The refrigerant does not flow back. Therefore, the suction pressure outside the compression chamber (balance pressure before operation) becomes higher than the pressure of the compression chamber whose volume is increasing, so that the directions of the gas loads F gb and F rb are shifted by 180 ° from those in the normal rotation. In FIG. 20,
The inclination angle α is inclined toward the rotation direction side of the main shaft 5, but the size does not change from that at the time of forward rotation, or a small clearance required for fitting the slider mounting shaft 6 and the slider fitting hole 7 a. When the angle is merely added to α, the equation (2) is obtained, and the slider 7 moves in the sliding direction as in the case of the forward rotation, and presses the orbiting scroll 2 against the fixed scroll 1 to rotate in reverse with the radial clearance set to 0. .

[0007]

[Number 2] (F cb + F rb) cosα -μ b F nb> F gb sinα F cb: centrifugal force during the reverse rotation (F cb = F ca) F gb: and perpendicular centrifugal force F cb during reverse rotation Gas load acting in the direction F rb : Gas load acting in the same direction as the centrifugal force F cb during reverse rotation F nb : Contact force between the non-sliding surface and the flat surface (B) μ b : Anti-sliding surface Of friction between the bearing and the flat surface (B)

FIG. 21 shows a second conventional scroll compressor, and FIG. 22 is a detailed view of parts related to the gear pump 9. The pump case 9a has an inner gear 9b having a gear formed on an outer surface in a lower half thereof, and an outer gear 9 having a gear meshed with a gear of the inner gear 9b formed on an inner surface.
The upper half has a hole through which a pump driving unit 5d provided at the lower end of the main shaft 5 penetrates. The gap between the inner gear 9b and the outer gear 9c is mainly determined by three gears, ie, a gap space at three places, a gap space A9h, a gap space B9j, and a gap space C9j.
These gaps are sequentially moved in the rotation direction by the rotation of both gears. The pump port 9d is provided with an oil absorbing port 9e and an oil discharging port 9f, and an oil absorbing pipe 9g is attached so as to communicate with a through hole below the oil absorbing port 9e. The clearance A9h communicates with the oil suction port 9e, the clearance C9j communicates with the oil discharge port 9f, and the clearance B9i does not communicate with any port. And
The pump case 9a and the pump port 9d are housed in the subframe 11 in a fixed state.

Next, the operation of the gear pump 9 will be described. 21 and 22, the forward rotation of the main shaft 5 (left rotation in FIG. 22) drives the inner gear 9b in the left rotation direction, and the outer gear 9c meshed with the inner gear 9b also rotates in the left rotation direction. Is driven. Due to the left rotation of both gears, the volume of the clearance space A9h among the three clearance spaces formed between the two gears increases, the volume becomes maximum in the clearance space B9i, and the volume becomes large in the clearance space C9j. Decreasing. For this reason, the lubricating oil accumulated at the bottom of the closed container 10 is supplied to the oil absorbing pipe 9 g and the oil absorbing port 9.
After e, it is sucked into the gap space A9h whose volume increases as described above. Then, the lubricating oil reaches the clearance space C9j whose volume decreases as described above via the clearance space B9i. Subsequently, the lubricating oil is discharged to the oil discharge port 9f due to the decrease in the volume of the clearance space C9j, and then supplied to each sliding portion of the compressor through an oil hole provided at the center of the main shaft 5.

[0010]

Since the first conventional scroll type compressor is constructed as described above, if the motor rotates reversely due to an erroneous connection of a power supply terminal or the like, the radial direction of both scrolls will be reduced. When the clearance is zero, the volume of the compression chamber increases, and the discharge valve acts as a check valve,
Since the reverse flow of the refrigerant is stopped, if the compression chambers other than the outermost compression chamber continue to rotate in the reverse direction, a vacuum will be created and the fixed scroll and the orbiting scroll will undergo large deformation in the axial direction. There is a problem in that abnormal contact with the teeth causes damage to the tooth tips, making operation impossible. When the inclination angle α is increased, the number of reverse rotations becomes three, and the slider moves in a direction in which the eccentricity r of the orbiting scroll becomes smaller, and a radial clearance is generated in both scrolls, thereby relieving the vacuum state. However, if the inclination angle α is large, the force of the slider to move in the sliding direction becomes larger than the number of forward rotations of 1, and the contact force that causes the spiral body of the orbiting scroll to press the spiral body of the fixed scroll becomes larger. The input value increases due to an increase in mechanical loss due to the friction, and the performance of the compressor is remarkably reduced. In the worst case, there is a problem that the scrolls of both scrolls are destroyed by the contact force pressing.

[0011]

(F cb + F rb ) cos α-μ b F nb <F gb sin α

With regard to the oil supply of the second conventional scroll compressor, the inner gear 9b and the outer gear 9c are driven clockwise in FIG. 22 at the time of reverse rotation, so that the volume of the clearance C9j increases. , The volume of the clearance space A9h is reduced. For this reason, the lubricating oil is conveyed from the oil draining port 9f to the oil absorbing port 9e, and the gear pump 11 does not fulfill the function of supplying the lubricating oil accumulated at the bottom of the closed vessel 10 to each sliding portion of the compressor. The sliding portion has a problem that the lubricating oil runs out and seizes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the compression chamber may be evacuated even if the motor is reversely operated due to incorrect connection of a power supply terminal. It is an object of the present invention to obtain a highly reliable scroll type compressor that does not cause damage to the tips of the fixed scroll and the orbiting scroll.

Further, at the time of forward rotation, the orbiting scroll presses the fixed scroll with an appropriate contact force to perform a high-efficiency compression action without leakage.
An object of the present invention is to provide a highly reliable scroll compressor in which lubricating oil is reliably supplied to each sliding portion of a compressor, and each sliding portion does not seize.

[0015]

According to a first aspect of the present invention, there is provided a scroll type compressor in which a swinging scroll is provided between a non-sliding surface of a slider fitting hole at the time of normal rotation of a main shaft and a slider mounting shaft at the time of main shaft reverse rotation. The slider moves in the direction to reduce the amount of eccentricity
A clearance is provided for allowing a force to act .

According to a second aspect of the present invention, there is provided the scroll type compressor according to the first aspect, wherein a clearance between the opposite sliding surface of the slider fitting hole and the slider mounting shaft during forward rotation of the main shaft is equal to that of the main shaft. The angle between the direction of the slider movement to the side where the eccentric amount of the orbiting scroll becomes large during rotation and the direction of the centrifugal force acting on the orbiting scroll and the slider is α, and the amount of eccentricity of the orbiting scroll during the main shaft reverse rotation is large. The angle between the direction of movement of the slider to the right side and the direction of centrifugal force acting on the orbiting scroll and slider is β
Where β> α.

According to a third aspect of the present invention, there is provided the scroll type compressor according to the first or second aspect, wherein the direction of movement of the slider to the side where the amount of eccentricity of the orbiting scroll at the time of reverse rotation of the main shaft is increased. Assuming that the angle between the direction of the centrifugal force acting on the scroll and the slider is β, the clearance between the non-sliding surface of the slider fitting hole and the slider mounting shaft during forward rotation of the spindle is expressed by the following equation (1). The size is such that β is satisfied. (F cb + F rb ) cos β + μ b F nb <F gb sin β (1) where F cb is a centrifugal force at the time of reverse rotation F gb is a gas acting in a direction perpendicular to the centrifugal force at the time of reverse rotation F cb Load F rb : Gas load acting in the same direction as the centrifugal force F cb during reverse rotation F nb : Contact force between the non-sliding surface and the slider mounting shaft that comes into contact during reverse rotation μ b : The anti-sliding surface and slider mounting shaft Coefficient of friction between

According to a fourth aspect of the present invention, there is provided the scroll type compressor according to any one of the first to third aspects, wherein the shape of the slider and the slider mounting shaft or the main shaft is in a plane perpendicular to the axis of the main shaft. The slider is shaped so that it cannot be fitted to the slider mounting shaft by rotating by 180 °.

According to a fifth aspect of the present invention, there is provided a scroll type compressor, wherein the slider mounting shaft and the slider fitting hole are divergent in the slider moving direction to the side where the amount of eccentricity of the orbiting scroll becomes large, and when the main shaft reversely rotates. The angle between the direction of the centrifugal force acting on the orbiting scroll and the slider and the anti-sliding surface is set to an angle such that the slider moves in a direction in which the amount of eccentricity of the orbiting scroll becomes smaller at the time of the main shaft reverse rotation. It is.

According to a sixth aspect of the present invention, there is provided the scroll type compressor according to the fifth aspect, wherein the angle between the sliding surface and the direction of the centrifugal force acting on the oscillating scroll and the slider during the forward rotation of the main shaft is α, When the angle between the anti-sliding surface at the time of the main shaft reverse rotation and the direction of the centrifugal force acting on the orbiting scroll and the slider is β, the anti-slide at the time of the main shaft reverse rotation at β> α is satisfied. The angle between the surface and the direction of the centrifugal force acting on the oscillating scroll and the slider is set.

A scroll compressor according to a seventh aspect of the present invention is the scroll compressor according to the fifth or sixth aspect, wherein the direction of the centrifugal force acting on the anti-sliding surface, the orbiting scroll and the slider when the main shaft is reversely rotated. When the angle to be formed is β, the angle β is set to a size satisfying the following expression (1). (F cb + F rb ) cos β + μ b F nb <F gb sin β (1) where F cb is a centrifugal force at the time of reverse rotation F gb is a gas acting in a direction perpendicular to the centrifugal force at the time of reverse rotation F cb Load F rb : Gas load acting in the same direction as the centrifugal force F cb during reverse rotation F nb : Contact force between the non-sliding surface and the slider mounting shaft that comes into contact during reverse rotation μ b : The anti-sliding surface and slider mounting shaft Coefficient of friction between

In the scroll compressor according to the present invention, a stopper mechanism for restricting the movement of the slider in a direction in which the eccentric amount of the orbiting scroll increases when the main shaft is rotated in the reverse direction is provided on the slider mounting shaft and the slider.

According to a ninth aspect of the present invention, there is provided a scroll type compressor having a pump case which rotates by 180 ° in a plane perpendicular to the axis of the main shaft when the main shaft rotates forward and reversely.

According to a tenth aspect of the present invention, there is provided the scroll type compressor according to the ninth aspect, wherein one of the pump port and the pump case is provided with a projection, and the other is engaged with the projection by 180 °. An annular groove is formed.

[0025]

According to the first aspect of the present invention, when the slider is moved in the direction in which the eccentricity of the orbiting scroll is reduced during the reverse rotation of the main shaft, a radial clearance is generated between the two scrolls, and the vacuum state in the compression chamber is reduced. Can be relieved.

According to the second aspect of the present invention, when the slider is moved in the direction in which the eccentric amount of the orbiting scroll is reduced during the reverse rotation of the main shaft, a radial clearance is generated in both scrolls, and the vacuum state in the compression chamber is reduced. Can be relieved.

According to the third aspect of the present invention, when the slider is moved in the direction in which the eccentricity of the orbiting scroll is reduced during the reverse rotation of the main shaft, a radial clearance is generated between the two scrolls, and the vacuum state in the compression chamber is reduced. Can be relieved.

According to the scroll type compressor of the fourth aspect, since the slider is not mounted on the slider mounting shaft by being rotated by 180 ° in a plane perpendicular to the axis of the main shaft, the swing scroll can be used when the main shaft is rotated in the reverse direction. The slider surely moves in the direction in which the amount of eccentricity decreases, and a radial clearance is created between both scrolls, so that the vacuum state in the compression chamber can be relieved.

In the scroll compressor according to the fifth aspect, when the slider is moved in the direction in which the eccentricity of the orbiting scroll is reduced during the reverse rotation of the main shaft, a radial clearance is generated in both scrolls, and the vacuum state in the compression chamber is reduced. Can be relieved.

In the scroll compressor according to the sixth aspect, when the slider is moved in the direction in which the eccentric amount of the orbiting scroll is reduced during the reverse rotation of the main shaft, a radial clearance is generated in both scrolls, and the vacuum state in the compression chamber is reduced. Can be relieved.

In the scroll type compressor according to the present invention, when the slider is moved in the direction in which the eccentricity of the orbiting scroll is reduced at the time of the main shaft reverse rotation, a radial clearance is generated between both scrolls, and the vacuum state in the compression chamber is reduced. Can be relieved.

In the scroll compressor according to the present invention, the movement of the slider in the direction in which the amount of eccentricity of the orbiting scroll is increased during the reverse rotation of the main shaft is restricted. Can be prevented from being in a vacuum state.

In the scroll type compressor according to the ninth aspect, only the pump port rotates by 180 ° in a plane perpendicular to the axis of the main shaft at the time of the main shaft reverse rotation. A clearance space having a reduced volume communicates with the oil drain port. Therefore, even at the time of the main shaft reverse rotation, the lubricating oil collected at the bottom of the sealed container is reliably supplied to each sliding portion by the gear pump.

In the scroll type compressor according to the present invention, only the pump port rotates by 180 ° in a plane perpendicular to the axis of the main shaft at the time of main shaft reverse rotation, and a clearance space whose volume increases increases communicates with the oil absorption port. Since the clearance space in which the volume is reduced communicates with the oil discharge port, the lubricating oil collected at the bottom of the sealed container is reliably supplied to each sliding portion by the gear pump even during the main shaft reverse rotation.

[0035]

[Embodiment 1] The first embodiment will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part at the time of forward rotation of the motor, and FIG. 5 is a cross-sectional view of a main part at the time of reverse rotation of the motor. Here, parts that are the same as or correspond to those in the conventional example are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 1, the inclination angle becomes α at the time of forward rotation, and the slider mounting shaft 6 and the slider 6 are moved so that a clearance of δ is generated between the flat surface B 6 b of the slider mounting shaft 6 and the anti-sliding surface 7 c of the slider 7. Mating hole 7
Set the clearance with a.

When the power supply terminal is normally connected and the main shaft 5 rotates in the normal rotation direction shown in FIG. 1, the inclination angle becomes α.
Satisfy the number 1 in the conventional example similar forward rotation, the slider 7 is the sliding direction, and a variable position, that is, until the eccentric amount r 1 which is determined by both scrolls the swing scroll 2 is in contact with the fixed scroll 1, the orbiting scroll 2 is pressed against the fixed scroll 1 with an appropriate contact force, and the compression action is performed with the radial clearances in both the eccentric direction and the anti-eccentric direction being zero. Further, the slider 7 is further compared with the state slid to eccentricity r 1, for slidable back and forth in the sliding direction, the fixed scroll 1 and the orbiting scroll 2
Even if the shape of the spiral body deviates from the predetermined dimension, the scroll slides until both scrolls come into contact with each other, so that the radial clearance during one rotation can always be zero.

On the other hand, if the power supply terminal is incorrectly connected and the motor rotates in the reverse direction, when the main shaft 5 rotates in the reverse rotation direction shown in FIG. 2, the flat surface B6b of the slider mounting shaft 6 and the opposite sliding surface of the slider 7 7c come into contact with each other, and a clearance of δ is generated between the flat surface A6a and the sliding surface 7b. For this reason slider 7
The positional relationship between the main shaft 5 and the slider mounting shaft 6 integrally formed changes with the forward rotation, and a slider 7 acting in a direction connecting the center of the main shaft 5 and the center of the orbiting scroll 2 (the center of the slider 7). The direction of the centrifugal force F cb of the orbiting scroll 2 is larger than the direction of the centrifugal force F ca at the time of normal rotation with respect to the sliding direction of the slider 7 (inclination angle). Is inclined in the direction of rotation of the main shaft 5 with respect to the direction of the centrifugal force F cb . Assuming that the inclination angle at the time of reverse rotation is β, β> α, and if β satisfies Equation 4, the slider 7 moves in a direction in which the eccentricity r of the orbiting scroll 2 decreases, and a radial clearance is provided between both scrolls. Occurs and the vacuum state is relieved. Therefore, by setting the clearance δ between the flat surface B6b at the time of normal rotation and the opposite sliding surface 7c so as to satisfy β which satisfies Equation 4, a radial clearance occurs in both scrolls at the time of reverse rotation.

Therefore, in the first embodiment, the clearance between the slider mounting shaft 6 and the slider fitting hole 7a is set so that the inclination angle is α at the time of normal rotation, and β at the time of reverse rotation, which satisfies Expression 4. Oscillating scroll 2 during forward rotation
Is pressed against the fixed scroll 1 with an appropriate contact force, the clearance in the radial direction of both scrolls is set to zero, and a high-efficiency compression action without leakage is performed.
The slider 7 moves in a direction in which the eccentricity r of
A radial clearance is created between both scrolls, so that the vacuum state in the compression chamber can be relieved.

[0039]

(F cb + F rb ) cos β + μ b F nb <F gb sin β

Embodiment 2 FIG. In the first embodiment, when the slider 7 is mounted, the slider 7 may be erroneously mounted by being shifted by 180 ° in a plane perpendicular to the axis of the main shaft 5. FIG. 3 shows that the slider 7 according to the first embodiment is rotated 180 degrees in a plane perpendicular to the axis of the main shaft 5.
装着 Indicates the force that is applied when the motor is mounted forward and rotates forward. As shown in FIG. 3, the flat surface A6a and the anti-sliding surface 7
When c is forward in contact, the distance L 1 center line and anti sliding surface 7 than the center line and the sliding surface 7b of the slider 7 as shown in FIG. 1
Since direction of distances L 2 and c is large, L 1 and L becomes γ larger than the inclination angle α is the difference of 2, moreover the direction of rotation of the main shaft 5 with respect to the sliding direction the centrifugal force F ca direction of the slider 7 To lean on. That becomes a working state of the reverse rotation when the same force in Example 2, L 1 and eccentricity r of the orbiting scroll 2 when the difference between L 2 is large becomes spite number 5 is the forward rotation The slider 7 moves in a direction in which the distance becomes smaller, and a radial clearance is generated between the two scrolls, so that the slider 7 may not be able to be compressed.

[0041]

Equation 5] (F ca + F ra) cosγ + μ c F nb <F ga sinγ μ c: coefficient of friction between the anti-sliding surface and flat担面(A)

A second embodiment in which the mounting error of the slider 7 does not occur will be described with reference to the drawings. FIG. 4 is a cross-sectional view of a main part when the slider mounting shaft 6 and the slider 7 according to the second embodiment are normally mounted and normally rotated. As shown in FIG. 4, the width L 3 of the fitting hole 7 a located at a position δ from the center of the non-sliding surface 7 c of the slider 7 is smaller than the width L 4 of the flat surface A 6 a of the slider mounting shaft 6. Also, as in the first embodiment, the inclination angle becomes α during normal rotation, and the flat surface B6b
And the anti-sliding surface 7c have a clearance of δ. Since the second embodiment is configured as described above, the slider 7
Even if it is attempted to displace it by 180 ° in a plane perpendicular to the axis of the main shaft 5, it is impossible to install it because L 3 <L 4.
Is pressed against the fixed scroll 1 with an appropriate contact force, and the radial clearance of both scrolls is set to zero to perform a high-efficiency compression action without leakage, and the slider 7 is moved in a direction in which the eccentricity r of the orbiting scroll 2 becomes small at the time of reverse rotation. As a result, a radial clearance is created between both scrolls, so that the vacuum state in the compression chamber can be relieved.

Embodiment 3 FIG. FIG. 5 is a perspective view of a main shaft 5 according to the third embodiment, and FIG. 6 is a perspective view of a similar slider 7. FIG. 7 is a cross-sectional view of essential parts when the slider mounting shaft 6 and the slider 7 in this embodiment are normally mounted and normally rotated. FIG.
5b is an upper end surface of the main shaft 5 and 5c is a protrusion provided on the upper end surface 5b, which may be formed integrally with the main shaft 5, may be provided with a pin or may be provided with a bolt. . FIG.
7d is a lower end surface of the slider 7, and 7e is a concave portion provided on the lower end surface 7d. Here, when the slider 7 is normally mounted, the convex portion 5c is surrounded by the concave portion 7e, and the convex portion 5c and the concave portion 7e are positioned so that the lower end surface 7d contacts the upper end surface 5b in parallel. The size of the concave portion 7e is set to a size such that the concave portion 7e does not come into contact with the convex portion 5c during any operation of the slider 7 (forward rotation / reverse rotation). As in the first embodiment, as shown in FIG. 7, the inclination angle becomes α at the time of normal rotation, and a clearance of δ occurs between the flat surface B6b and the anti-sliding surface 7c. Since the third embodiment is configured as described above, even if an attempt is made to mount the slider 7 with a shift of 180 ° in a plane perpendicular to the axis of the main shaft 5, the positional relationship between the convex portion 5c and the concave portion 7e is also shifted by 180 °. Convex part 5c
Is in contact with the lower end surface 7e, and the slider 7 is
Of the orbiting scroll 2 as a subsequent process becomes impossible.

Also, as in the first embodiment, the orbiting scroll 2 is pressed against the fixed scroll 1 with an appropriate contact force at the time of forward rotation, and a high-efficiency compression action without leakage is performed by setting the radial clearance of both scrolls to zero, while at the time of reverse rotation. Dynamic scroll 2
The slider 7 moves in a direction in which the eccentricity r of
A radial clearance is created between both scrolls, so that the vacuum state in the compression chamber can be relieved.

In the third embodiment, the protrusion 5c
The position of the recess 7e may be provided anywhere on the upper end face 5b or the lower end face 7d as long as they correspond to each other, and the recess 7e may face the slider fitting hole 7a. The same effect can be obtained by providing the convex portion 5c on the lower end surface 7d of the slider 7 and the concave portion 7e on the upper end surface 5b of the main shaft 5.

Embodiment 4 FIG. Next, a fourth embodiment will be described with reference to the drawings. FIG. 8 is a cross-sectional view of a main part of this embodiment at the time of forward rotation of the motor, and FIG.
It is principal part sectional drawing at the time of motor reverse rotation, and represents the force which acts. As shown in FIG. 8, during normal rotation, the inclination angle is α
The angle between the sliding surface 7b of the slider 7 and the flat surface A6a of the slider mounting shaft 6 is set such that Further, as shown in FIG. 9, the angle between the non-sliding surface 7c of the slider 7 and the flat surface B6b of the slider mounting shaft 6 is set so that the inclination angle becomes β satisfying the expression 4 at the time of reverse rotation. A clearance is provided in a fitting hole 7a between the slider mounting shaft 6 and the slider 7, so that the slider 7 can be moved in the sliding direction and the anti-sliding direction.

Therefore, the sliding surface 7b of the slider 7 and the anti-sliding surface 7c are not parallel, and are fitted in the sliding direction of the slider 7 (the moving direction to the side where the eccentricity r increases as described above). The hole 7a has a divergent shape. Similarly, the flat surface A6a and the flat surface B6b of the slider mounting shaft 6 are not parallel, and the slider mounting shaft 6 has a divergent shape in the sliding direction of the slider 7.

Since the fourth embodiment is configured as described above, the inclination angle becomes α at the time of forward rotation of the motor, so that the slider 7 contacts the sliding direction and the orbiting scroll 2 contacts the fixed scroll 1 as in the first embodiment. located, i.e. the variable and to eccentricity r 1 which is determined by both scrolls, pressed with moderate contact force the swing scroll 2 in the fixed scroll 1, a radial clearance of the eccentric direction and counter eccentric direction of both scrolls 0 , A compression action is performed. Further, the slider 7 is further compared with the state slid to eccentricity r 1, for slidable back and forth in the sliding direction, even if the shape of the spiral of the fixed scroll 1 and the orbiting scroll 2 is deviated from the predetermined size Since both scrolls slide until they come into contact with each other, the radial clearance during one rotation can always be zero.

At the time of reverse rotation of the motor, the inclination angle becomes β, which satisfies Expression 4, and the slider 7 moves in a direction in which the eccentricity r of the orbiting scroll 2 becomes smaller, so that a radial clearance is generated between both scrolls. The vacuum state can be relieved. Further, since the shape of the fitting hole 7a of the slider 7 and the shape of the slider mounting shaft 6 are divergent, the slider 7 is not erroneously mounted 180 ° in the rotational direction.

Embodiment 5 FIG. Next, a fifth embodiment will be described with reference to the drawings. FIG. 10 is a top view of the slider mounting shaft 6 in this embodiment, and FIG. 11 is a top view of the same slider 7. FIG. 12 is a cross-sectional view of a main part during forward rotation, and FIGS. 13 and 14 are cross-sectional views of a main part during reverse rotation. In FIG. 10, a groove 6c is provided on a flat surface B6b, and a tapered surface 6d is formed on a side surface of the groove 6c on the slide direction side toward the flat surface B6b. 6e is a side surface on the sliding direction side other than the tapered surface 6d, and is referred to as a groove side surface here.

In FIG. 11, the anti-sliding surface 7c has
A protrusion 7f having a width smaller than the width of the groove 6c, a height lower than the depth of the groove 6c, and a height higher than the depth of the tapered surface 6d is formed. The protrusion 7f is formed integrally with the slider 7 or a key or the like. Inserted and formed. 7g is projection 7
The side surface on the sliding direction side of f is referred to as a projection side surface here.
7h is a corner on the slide direction side of the projection 7f, and is referred to as a corner here. As shown in FIG. 12, the fitting hole 7a between the slider mounting shaft 6 and the slider 7 has a flat surface B during normal rotation.
A clearance d wider than the height of the protrusion 7f is formed between the flat surface A6a and the sliding surface 7b, and the flat surface A6a and the sliding surface 7b contact each other in parallel, and the inclination angle becomes α. Then, in the state of eccentricity r 1 of eccentricity i.e. the spiral body of the swing scroll 2 is determined by the shape of the spiral bodies of both scrolls is pressed against the spiral body of the fixed scroll 1, protrusions aspect 7g is the groove side surface 6e The projection 7f and the groove 6c are formed at a position where the extension S of the projection side surface 7g intersects with the tapered surface 6d by the distance S on the slide direction side.

Next, FIG. 13 shows a case where the present embodiment rotates in the reverse direction.
FIG. 14 will be described. Immediately after the main shaft 5 is started reverse rotation, eccentricity as shown in FIG. 13 is a tapered surface 6d is in contact with the corner 7g of first projections 7f in a state of r 1. However, because of the contact between the tapered surface and the corner, the slider mounting shaft 6
The position of the slider 7 and the position of the slider 7 are not stabilized in this state.
14 moves in the direction opposite to the sliding direction along FIG.
At the same time as the end of the tapered surface 6d, the protrusion 7f is buried in the groove 6c, and the flat surface B6b and the non-sliding surface 7c come into contact with each other. Thus the slider 7 has a distance S by the sliding direction retreated in the opposite direction r 1 is less than the amount of eccentricity r 2, and the gap in the radial direction is generated in the both scrolls.

Even when a force is applied to the slider 7 to move the slider 7 in the sliding direction, the projection side surface 7f contacts the groove side surface 6e, and these serve as stoppers, so that the slider 7 moves further in the sliding direction. Can not do,
The radial clearance between both scrolls is maintained.

As described above, in the fifth embodiment, as in the second embodiment, the orbiting scroll 2 is pressed against the fixed scroll 1 with an appropriate contact force at the time of normal rotation, and the radial clearance between the two scrolls is set to zero, so that high efficiency without leakage is obtained. During the reverse rotation, the compression operation is performed, and the movement of the slider 7 in the sliding direction (the direction in which the spiral body is pressed) is restricted, so that the radial clearance of both scrolls is maintained. Absent.

In the fifth embodiment, the groove 6c and the projection 7f
May be provided anywhere on the flat surface B6b or the anti-contact surface 7c as long as the above conditions are satisfied. Also, a projection 7f is formed on the flat surface B6b, a groove 6c is formed on the anti-contact surface 7c, and a tapered surface is formed. The same effect can be obtained by forming 6d on the side surface on the side opposite to the slide direction.

In FIG. 10 and FIG.
c and projection 7f are flat surface B6b and b anti-contact surface 7c
Although it is formed over the entire height above, even if it is partially provided at an arbitrary height, the same effect can be obtained as long as the above conditions are satisfied.

Embodiment 6 FIG. Finally, Embodiment 6 will be described with reference to the drawings. FIG. 15 is a perspective view of the pump case 9a and the pump port 9d according to the present invention. The other parts related to the gear pump are the same as those of the conventional example, and will not be described here. The pump port 9d is provided with a cylindrical projection 91, and the pump case 9l is provided.
a is provided with a 180 ° annular groove 9k which engages with the projection 9l.

While the pump port 9d is fixed to the subframe 8, the pump case 9a is
The upper end surface is slidably joined to the lower end surface of the main shaft 5, the lower end surface is slidably joined to the pump port 9 d, and the outer peripheral portion is accommodated with a small gap between the subframe 11. ing. For this reason, the pump case 9a is configured to be rotatable by 180 ° with respect to the pump port 9d only in the direction shown by the arrow in the figure from the positional relationship shown in the figure.

FIG. 16 is an explanatory view of the operation of the gear pump of this embodiment at the time of forward rotation of the motor. In the figure, the pump port 9d is drawn by a dotted line. During forward rotation of the main shaft 5 (left rotation in FIG. 16), the pump case 9a joined to the main shaft 5 always receives a left-hand rotational moment due to rotational frictional force from the main shaft 5. On the other hand, a pressing force f is generated between the protrusion 91 of the pump port 9d and the left end of the 180-degree annular groove 9k of the pump case 9a, thereby canceling the above-described rotation moment of the left rotation. Therefore, during normal rotation, the pump case 9a is stabilized at the position shown in FIG. In such a case, the mechanism in which the lubricating oil accumulated at the bottom of the closed casing 10 is supplied to each sliding portion of the compressor has been described in the conventional example, and is omitted here.

FIG. 17 is an explanatory diagram of the operation of the gear pump according to the present embodiment at the time of reverse rotation of the motor. In the figure, the pump port 9d is drawn by a dotted line. During the reverse rotation of the main shaft 5 (right rotation in FIG. 17), the pump case 9a joined to the main shaft 5 always receives a right-hand rotational moment due to rotational frictional force from the main shaft 5. Therefore, the pump case 9a is different from the position at the time of normal rotation shown in FIG.
It is stable in the position shown in. At this time, a pressing force f is generated between the protrusion 91 of the pump port 9d and the right end of the 180 ° annular groove of the pump case 9a, thereby canceling the above-described right-hand rotational moment.

As described above, since the pump case 9a is at a position rotated by 180 degrees with respect to the time of the normal rotation, the pump case 9a is formed of the three spaces formed between the inner gear 9d and the outer gear 9c. The space C9j communicates with the oil suction port 9e, and the gap space A9h communicates with the oil discharge port 9f. In addition, at the time of reverse rotation, the clearance space C
9j increases its volume, and the clearance space A9h decreases its volume.

For this reason, the lubricating oil accumulated at the bottom of the closed container 10 passes through the oil absorbing pipe 9g and the oil absorbing port 9e, and as described above, the clearance space C9 whose volume increases.
sucked by j. And the lubricating oil is the clearance space B9
Through i, the space reaches the clearance space A9h where the volume decreases as described above. The lubricating oil continues to be in the clearance space A9
Due to the decrease in the volume of h, the oil is discharged to the oil discharge port 9f, and then supplied to each sliding portion of the compressor through an oil hole provided at the center of the main shaft 5.

[0063]

According to the first aspect of the present invention, the eccentric amount of the orbiting scroll is small between the counter sliding surface of the slider fitting hole and the slider mounting shaft at the time of the main shaft normal rotation. Force to move the slider in
The swinging scroll presses the fixed scroll with an appropriate contact force during normal rotation of the main shaft and the radial clearance of both scrolls is zero, providing high-efficiency compression without leakage. If the main shaft rotates in reverse by accidentally rotating the motor, the slider moves in the direction in which the amount of eccentricity of the orbiting scroll becomes smaller, so that a radial clearance occurs in both scrolls and the vacuum state in the compression chamber is relieved. Therefore, there is an effect that a highly efficient and highly reliable scroll compressor in which the tooth tips of both scrolls are not damaged can be obtained.

In the scroll type compressor according to the second aspect, the clearance between the opposite sliding surface of the slider fitting hole and the slider mounting shaft at the time of the main shaft forward rotation is such that the eccentric amount of the orbiting scroll at the time of the main shaft forward rotation is reduced. The angle between the direction of movement of the slider toward the larger side and the direction of the centrifugal force acting on the orbiting scroll and the slider is α, and the direction and the direction of the slider movement toward the side where the amount of eccentricity of the orbiting scroll during reverse rotation of the spindle is increased. When the angle between the direction of the centrifugal force acting on the scroll and the slider is β, the size is such that β> α. Therefore, when the main shaft rotates forward, the orbiting scroll presses the fixed scroll with an appropriate contact force and the radius of both scrolls. Performs a highly efficient compression action without leakage, with zero directional clearance.
If the main shaft rotates in the reverse direction by accidentally rotating the motor, the slider moves in the direction in which the eccentricity of the orbiting scroll becomes smaller, so that a radial clearance occurs in both scrolls and the vacuum state in the compression chamber is relieved. It is possible,
Therefore, there is an effect that a highly efficient and highly reliable scroll compressor in which the tooth tips of both scrolls are not damaged can be obtained.

According to a third aspect of the present invention, the angle between the direction of movement of the slider toward the side where the amount of eccentricity of the orbiting scroll becomes large and the direction of the centrifugal force acting on the orbiting scroll and the slider during the reverse rotation of the main shaft is set. When β is set, the clearance between the non-sliding surface of the slider fitting hole and the slider-mounted shaft during the forward rotation of the main shaft is set to a size that satisfies the following expression (1). When rotating, the orbiting scroll presses the fixed scroll with an appropriate contact force to reduce the radial clearance of both scrolls to zero, performs high-efficiency compression action without leakage, and reverses the motor by mistake and reverses the spindle. Since the slider moves in the direction in which the amount of eccentricity of the orbiting scroll becomes smaller, a radial clearance is generated in both scrolls, and the vacuum state in the compression chamber can be relieved. Therefore, there is an effect that a highly efficient and highly reliable scroll compressor in which the tooth tips of both scrolls are not damaged can be obtained. (F cb + F rb ) cos β + μ b F nb <F gb sin β (1) where F cb is a centrifugal force at the time of reverse rotation F gb is a gas acting in a direction perpendicular to the centrifugal force at the time of reverse rotation F cb Load F rb : Gas load acting in the same direction as the centrifugal force F cb during reverse rotation F nb : Contact force between the non-sliding surface and the slider mounting shaft that comes into contact during reverse rotation μ b : The anti-sliding surface and slider mounting shaft Coefficient of friction between

In the scroll compressor according to the fourth aspect, the shape of the slider and the slider mounting shaft or the main shaft is rotated by 180 ° in a plane perpendicular to the axis of the main shaft, so that the slider cannot be fitted to the slider mounting shaft. The slider was mistakenly set to 1 in a plane perpendicular to the axis of the spindle.
The swinging scroll presses the fixed scroll with an appropriate contact force when the main spindle is rotating forward, and the radial clearance of both scrolls is zero, ensuring high efficiency without leakage. When the main shaft is rotated by reverse rotation of the motor by mistake, the slider moves in the direction in which the amount of eccentricity of the orbiting scroll becomes small, so that both scrolls have a radial clearance, and the compression chamber Can be relieved, so that a highly efficient and highly reliable scroll compressor can be obtained without damaging the tooth tips of both scrolls.

According to a fifth aspect of the present invention, there is provided a scroll type compressor, wherein the slider mounting shaft and the slider fitting hole have a divergent shape in the slider moving direction to the side where the eccentricity of the orbiting scroll becomes large, and the main shaft is rotated in the reverse direction. Since the angle between the direction of the centrifugal force acting on the orbiting scroll and the slider and the anti-sliding surface is set to such an angle that the slider moves in a direction in which the amount of eccentricity of the orbiting scroll becomes smaller during the main shaft reverse rotation. During forward rotation of the main shaft, the orbiting scroll pressed the fixed scroll with an appropriate contact force to reduce the radial clearance of both scrolls to zero, and performed high-efficiency compression without leakage. In this case, since the slider moves in the direction in which the eccentricity of the orbiting scroll becomes smaller, a radial clearance occurs between both scrolls, and It is possible to relief the vacuum condition of the chamber, therefore the scrolls addendum of without damage high efficiency and high reliability scroll compressor there is an effect to be obtained.

According to a sixth aspect of the present invention, there is provided a scroll type compressor, wherein the angle between the sliding surface at the time of the main shaft normal rotation and the direction of the centrifugal force acting on the orbiting scroll and the slider is α, When the angle between the direction of the centrifugal force acting on the orbiting scroll and the slider is β,
The angle between the anti-sliding surface and the direction of the centrifugal force acting on the oscillating scroll and slider during reverse rotation of the spindle is set to an angle β such that β> α. The moving scroll presses the fixed scroll to reduce the radial clearance of both scrolls to zero, performs high-efficiency compression without leakage, and if the motor is reversed by mistake and the main shaft rotates in the reverse direction, the slider will be eccentric. Movement in the direction in which the volume becomes smaller creates a radial clearance in both scrolls, which can relieve the vacuum state in the compression chamber, thereby ensuring high efficiency and reliability without damaging the tips of both scrolls This has the effect of providing a scroll compressor having a high performance.

According to a seventh aspect of the present invention, when the angle formed between the anti-sliding surface and the direction of the centrifugal force acting on the orbiting scroll and the slider during the reverse rotation of the main shaft is β, the angle β is expressed by the following equation (1). ), The orbiting scroll presses the fixed scroll with an appropriate contact force during normal rotation of the main spindle and the radial clearance of both scrolls is set to zero. If the main shaft rotates in the reverse direction by accidentally rotating the motor, the slider moves in the direction in which the eccentricity of the orbiting scroll becomes smaller, so that a radial clearance occurs in both scrolls and the vacuum state in the compression chamber is relieved. Therefore, there is an effect that a highly efficient and highly reliable scroll compressor in which the tooth tips of both scrolls are not damaged can be obtained. (F cb + F rb ) cos β + μ b F nb <F gb sin β (1) where F cb is a centrifugal force at the time of reverse rotation F gb is a gas acting in a direction perpendicular to the centrifugal force at the time of reverse rotation F cb Load F rb : Gas load acting in the same direction as the centrifugal force F cb during reverse rotation F nb : Contact force between the non-sliding surface and the slider mounting shaft that comes into contact during reverse rotation μ b : The anti-sliding surface and slider mounting shaft Coefficient of friction between

In the scroll type compressor according to the present invention, the stopper mounting mechanism for restricting the movement of the slider in the direction in which the eccentricity of the orbiting scroll increases when the main shaft is rotated in the reverse direction is provided on the slider mounting shaft and the slider. When rotating, the orbiting scroll presses the fixed scroll with an appropriate contact force to reduce the radial clearance of both scrolls to zero, performs high-efficiency compression action without leakage, and reverses the motor by mistake and reverses the spindle. The slider is held at a position where the amount of eccentricity of the orbiting scroll is small, and cannot be moved by the stopper mechanism even if a force is applied to the slider in a direction to increase the amount of eccentricity of the orbiting scroll. Therefore, a radial clearance is maintained in both scrolls, and the compression chamber is not evacuated. The effect of never tooth tip is damaged high efficiency and high reliability scroll compressor can be obtained.

In the scroll type compressor according to the ninth aspect, only the pump case rotates by 180 ° in a plane perpendicular to the axis of the main shaft at the time of the main shaft reverse rotation. Similarly, the lubricating oil collected at the bottom of the sealed container is reliably supplied to each sliding portion of the compressor by the gear pump, and a highly reliable scroll type compressor in which each sliding portion does not seize is obtained. Has the effect.

According to a tenth aspect of the present invention, there is provided a scroll type compressor in which one of a pump port and a pump case is provided with a projection, and the other is formed with a 180 ° annular groove which engages with the projection. At the time of rotation, only the pump case rotates by 180 ° in a plane perpendicular to the axis of the main shaft, and the lubricating oil collected at the bottom of the sealed container by the gear pump is applied to each sliding part of the compressor as in the case of normal rotation of the main shaft. There is an effect that a highly reliable scroll type compressor can be obtained which is supplied reliably and does not seize each sliding portion.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a scroll compressor according to a first embodiment of the present invention at the time of forward rotation of a motor and a relation diagram of an acting force.

FIG. 2 is a sectional view of a main part when the motor of the scroll compressor according to the first embodiment of the present invention rotates in the reverse direction, and a relation diagram of the acting force.

FIG. 3 is a view showing a state in which a slider of the scroll compressor according to the first embodiment of the present invention is mounted so as to be shifted by 180 ° in a rotation direction;
It is a relation diagram of the force which acts when a motor rotates forward.

FIG. 4 is a cross-sectional view of a main part of a scroll compressor according to a second embodiment of the present invention at the time of forward rotation of a motor.

FIG. 5 is a perspective view of a main shaft of a scroll compressor according to Embodiment 3 of the present invention.

FIG. 6 is a perspective view of a slider of a scroll compressor according to Embodiment 3 of the present invention.

FIG. 7 is a cross-sectional view of a main part of a scroll compressor according to Embodiment 3 of the present invention at the time of forward rotation of a motor.

FIG. 8 is a sectional view of a main part of a scroll compressor according to a fourth embodiment of the present invention at the time of forward rotation of a motor, and a relation diagram of an acting force.

FIG. 9 is a sectional view of a main part of a scroll compressor according to a fourth embodiment of the present invention at the time of reverse rotation of a motor, and a diagram showing a relationship between applied forces.

FIG. 10 is a perspective view of a slider mounting shaft of a scroll compressor according to Embodiment 5 of the present invention.

FIG. 11 is a perspective view of a slider of a scroll compressor according to Embodiment 5 of the present invention.

FIG. 12 is a sectional view of a main part of a scroll compressor according to Embodiment 5 of the present invention at the time of forward rotation of a motor.

FIG. 13 is a sectional view of a main part of a scroll compressor according to a fifth embodiment of the present invention at the time of reverse rotation of the motor.

FIG. 14 is a cross-sectional view of a main part of a scroll compressor according to a fifth embodiment of the present invention at the time of reverse rotation of the motor.

FIG. 15 is a perspective view of representative components of a gear pump according to Embodiment 6 of the present invention.

FIG. 16 is an explanatory diagram of an operation of the gear pump according to Embodiment 6 of the present invention at the time of forward rotation of the motor.

FIG. 17 is an explanatory diagram of an operation of the gear pump according to the sixth embodiment of the present invention at the time of reverse rotation of the motor.

FIG. 18 is a longitudinal sectional view of a conventional scroll compressor.

FIG. 19 is a cross-sectional view of a main part of a conventional scroll compressor at the time of forward rotation of a motor and a relation diagram of acting forces.

FIG. 20 is a sectional view of a main part of a conventional scroll compressor at the time of reverse rotation of a motor and a relation diagram of an acting force.

FIG. 21 is a longitudinal sectional view of a conventional scroll compressor.

FIG. 22 is a detailed view of pump-related parts used in a conventional scroll compressor.

[Explanation of symbols]

1 Fixed scroll, 2 swinging scroll, 3 frames, 5 main shafts, 6 slider mounting shafts, 7 sliders, 9 gear pump.

Continued on the front page (72) Inventor Katsuyoshi Wada 3-181-1, Oka, Shizuoka-shi Mitsubishi Electric Corporation Shizuoka Works (72) Inventor Tatsuya Sugita 3-181, Oka, Shizuoka-shi Mitsubishi Electric Shizuoka Inside the factory (72) Inventor Shoji Hagiwara 3-18-1, Oka, Shizuoka-shi Mitsubishi Electric Corporation Shizuoka Factory

Claims (10)

(57) [Claims]
1. A spiral body protrudes from each base plate,
A fixed scroll and a oscillating scroll which form a compression chamber by being eccentrically combined with a phase shift of 180 °, an oscillating bearing provided on the anti-compression chamber side of the oscillating scroll, and a slider mounted at one end of the main shaft. A scroll compressor in which a shaft is provided with a slider slidably and non-rotatably mounted in a plane perpendicular to the axis of the main shaft, and the slider is fitted to the rocking bearing;
The slider has a fitting hole for fitting the slider mounting shaft, and the surface of the slider fitting hole that comes into contact with the slider mounting shaft with a contact force when the main shaft rotates forward is a sliding surface. When the opposite side of the sliding surface is an anti-sliding surface, between the anti-sliding surface of the slider fitting hole at the time of main shaft normal rotation and the slider mounting shaft, the orbiting scroll of the orbiting scroll at the time of main shaft reverse rotation. A scroll compressor having a clearance for allowing a force to move the slider in a direction in which the amount of eccentricity decreases.
The clearance is an angle between a direction of movement of a slider toward a side where the amount of eccentricity of the orbiting scroll becomes large and a direction of centrifugal force acting on the orbiting scroll and the slider at the time of forward rotation of a spindle. When the angle between the direction of movement of the slider toward the side where the eccentric amount of the orbiting scroll becomes large during the main shaft reverse rotation and the direction of the centrifugal force acting on the orbiting scroll and the slider is β, β
2. The scroll compressor according to claim 1, wherein the size of the scroll compressor is> α.
3. When the angle between the direction of movement of the slider toward the side where the amount of eccentricity of the orbiting scroll increases during reverse rotation of the spindle and the direction of centrifugal force acting on the orbiting scroll and the slider is β, The scroll compressor according to claim 1 or 2, wherein the clearance has a size satisfying β satisfying the following expression (1). (F cb + F rb ) cos β + μ b F nb <F gb sin β (1) where F cb is a centrifugal force at the time of reverse rotation F gb is a gas acting in a direction perpendicular to the centrifugal force at the time of reverse rotation F cb Load F rb : Gas load acting in the same direction as the centrifugal force F cb during reverse rotation F nb : Contact force between the non-sliding surface and the slider mounting shaft that comes into contact during reverse rotation μ b : The anti-sliding surface and slider mounting shaft Coefficient of friction between
4. The shape of the slider and the slider mounting shaft or the main shaft is 18 in a plane perpendicular to the axis of the main shaft.
The slider has a shape that cannot be fitted to the slider mounting shaft by rotating by 0 °.
3. The scroll compressor according to any one of 3.
5. A spiral body is protruded on each base plate,
A fixed scroll and a oscillating scroll which form a compression chamber by being eccentrically combined by being shifted by 180 ° from each other, an oscillating bearing provided on the anti-compression chamber side of the oscillating scroll, and a slider mounted at one end of the main shaft. A scroll compressor in which a shaft is provided with a slider slidably and non-rotatably mounted in a plane perpendicular to the axis of the main shaft, and the slider is fitted to the rocking bearing;
The slider mounting shaft has a divergent shape in a slider moving direction to a side where the eccentric amount of the orbiting scroll becomes large, and the slider has a fitting hole for fitting the slider mounting shaft, and The mating hole widens in the slider moving direction to the side where the amount of eccentricity of the orbiting scroll becomes large, and slides on a surface of the slider fitting hole which comes into contact with the slider mounting shaft with a contact force when the main shaft rotates forward. When the opposite side of the moving surface and the sliding surface of the slider fitting hole is an anti-sliding surface, the direction of the centrifugal force acting on the orbiting scroll and the slider during the reverse rotation of the main shaft and the direction of the anti-sliding surface. A scroll compressor, wherein the angle is set such that the slider moves in a direction in which the amount of eccentricity of the sliding scroll decreases when the main shaft rotates in the reverse direction.
6. An angle α between the sliding surface and the direction of the centrifugal force acting on the orbiting scroll and the slider when the main shaft rotates forward, and the anti-sliding surface and the orbiting scroll when the main shaft reversely rotates. 6. The scroll compressor according to claim 5, wherein when the angle formed by the centrifugal force acting on the slider is β, β> α.
7. When an angle formed by the centrifugal force acting on the anti-sliding surface and the orbiting scroll and the slider at the time of reverse rotation of the main shaft is β, the angle β has a size satisfying the following expression (1). The scroll compressor according to claim 5 or 6, wherein: (F cb + F rb ) cos β + μ b F nb <F gb sin β (1) where F cb is a centrifugal force at the time of reverse rotation F gb is a gas acting in a direction perpendicular to the centrifugal force at the time of reverse rotation F cb Load F rb : Gas load acting in the same direction as the centrifugal force F cb during reverse rotation F nb : Contact force between the non-sliding surface and the slider mounting shaft that comes into contact during reverse rotation μ b : The anti-sliding surface and slider mounting shaft Coefficient of friction between
8. A spiral body protrudes from each base plate,
A fixed scroll and a oscillating scroll which form a compression chamber by being eccentrically combined by being shifted by 180 ° from each other, an oscillating bearing provided on the anti-compression chamber side of the oscillating scroll, and a slider mounted at one end of the main shaft. A scroll compressor in which the shaft is provided with a slider slidably and non-rotatably mounted in a plane perpendicular to the axis of the main shaft, and the slider is fitted to the swing bearing;
A scroll type compressor, wherein a stopper mechanism for restricting movement of the slider in a direction in which the amount of eccentricity of the orbiting scroll increases when the main shaft is reversely rotated is provided on the slider mounting shaft and the slider.
9. An inner gear, which is rotationally driven by a main shaft and has a gear formed on an outer surface, and a gear meshing with a gear of the inner gear is formed on an inner surface, and an outer gear driven by rotation of the inner gear. A pump case in which the main shaft penetrates the center thereof and houses the inner gear and the outer gear, and another member that has an oil suction port portion and an oil drain port portion and houses the inner gear and the outer gear. In a scroll compressor having a gear pump constituted by a certain pump port, only the pump case rotates by 180 ° in a plane perpendicular to the axis of the main shaft during normal rotation and reverse rotation of the main shaft. Scroll type compressor.
10. The pump port according to claim 9, wherein one of the pump port and the pump case is provided with a protrusion, and the other is formed with a 180 ° annular groove which engages with the protrusion.
The scroll-type compressor as described.
JP33600292A 1991-12-27 1992-12-16 Scroll compressor Expired - Fee Related JP2737584B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP3-107966 1991-12-27
JP10796691 1991-12-27
JP33600292A JP2737584B2 (en) 1991-12-27 1992-12-16 Scroll compressor

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP33600292A JP2737584B2 (en) 1991-12-27 1992-12-16 Scroll compressor
US08/108,564 US5447419A (en) 1991-12-27 1992-12-22 Scroll-type compressor having clearances during reverse rotation and improper assembly prevention
PCT/JP1992/001682 WO1993013316A1 (en) 1991-12-27 1992-12-22 Scroll compressor
US08/237,590 US5433589A (en) 1991-12-27 1994-05-03 Scroll-type compressor having decreased eccentricity upon reverse rotation
US08/301,021 US5494421A (en) 1991-12-27 1994-09-06 Scroll compressor having a gear oil pump accommodating reverse rotation
US08/410,761 US5474434A (en) 1991-12-27 1995-03-27 Scroll-type compressor having radial scroll clearance during reverse rotation and improper assembly prevention

Publications (2)

Publication Number Publication Date
JPH05248372A JPH05248372A (en) 1993-09-24
JP2737584B2 true JP2737584B2 (en) 1998-04-08

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JP33600292A Expired - Fee Related JP2737584B2 (en) 1991-12-27 1992-12-16 Scroll compressor

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US (4) US5447419A (en)
JP (1) JP2737584B2 (en)
WO (1) WO1993013316A1 (en)

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Also Published As

Publication number Publication date
US5433589A (en) 1995-07-18
US5447419A (en) 1995-09-05
JPH05248372A (en) 1993-09-24
US5494421A (en) 1996-02-27
WO1993013316A1 (en) 1993-07-08
US5474434A (en) 1995-12-12

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